Had another play on it this evening. The presentation really helps, it doesnāt feel like a normal 4k game.
The level design is pretty good too. I keep on finding new ways to do solve them -
Level 5 in 6 moves. :
Level 11 in 15 moves.
Level 13 in 20 moves.
Level 15 in 22 moves.
Edit: one small bug I suppose. If you try to drag a block in a direction that it canāt go, it still counts as a move.